diff options
| author | Youling Tang <tangyouling@loongson.cn> | 2022-12-10 17:39:59 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-12-14 03:36:11 +0300 |
| commit | 26bc82441250f2e01621f5b26606a4f6926ee3ad (patch) | |
| tree | 22cebfb8711706c1ccd2123c9356f05b55f529cf /arch/loongarch/include/asm/extable.h | |
| parent | 3d36f4298ba91fbdec6bc56aa7bb0663cba6ab0c (diff) | |
| download | linux-26bc82441250f2e01621f5b26606a4f6926ee3ad.tar.xz | |
LoongArch: extable: Add `type` and `data` fields
This is a LoongArch port of commit d6e2cc564775 ("arm64: extable: add
`type` and `data` fields").
Subsequent patches will add specialized handlers for fixups, in addition
to the simple PC fixup we have today. In preparation, this patch adds a
new `type` field to struct exception_table_entry, and uses this to
distinguish the fixup and other cases. A `data` field is also added so
that subsequent patches can associate data specific to each exception
site (e.g. register numbers).
Handlers are named ex_handler_*() for consistency, following the example
of x86. At the same time, get_ex_fixup() is split out into a helper so
that it can be used by other ex_handler_*() functions in the subsequent
patches.
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include/asm/extable.h')
| -rw-r--r-- | arch/loongarch/include/asm/extable.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/extable.h b/arch/loongarch/include/asm/extable.h index b571c89705d1..92612b4364a1 100644 --- a/arch/loongarch/include/asm/extable.h +++ b/arch/loongarch/include/asm/extable.h @@ -17,10 +17,21 @@ struct exception_table_entry { int insn, fixup; + short type, data; }; #define ARCH_HAS_RELATIVE_EXTABLE +#define swap_ex_entry_fixup(a, b, tmp, delta) \ +do { \ + (a)->fixup = (b)->fixup + (delta); \ + (b)->fixup = (tmp).fixup - (delta); \ + (a)->type = (b)->type; \ + (b)->type = (tmp).type; \ + (a)->data = (b)->data; \ + (b)->data = (tmp).data; \ +} while (0) + bool fixup_exception(struct pt_regs *regs); #endif |